Last updated: August 21, 2025
January in Okayama, Japan presents a cool yet invigorating climate, with average temperatures hovering around 6°C (42°F). The maximum temperature can reach 16°C (62°F), providing brief moments of warmth, while chilly nights can plunge to a brisk -3°C (26°F). While the month sees a modest precipitation total of 33 mm (1.3 in) over just 3 days, the high humidity level at 82% adds a crispness to the air, making January a unique blend of cool temperatures and occasional rain.
In January, Okayama experiences cool temperatures that set the tone for winter in Japan, with lows dipping to -3°C (26°F) and an average of 6°C (42°F). The maximum temperature reaches a mild 16°C (62°F), providing a refreshing break from the chill. This month marks the beginning of a gradual warming trend leading into February, where the minimum slips slightly to -5°C (23°F) but the average remains steady. As spring approaches, March sees a slight uptick in temperatures, with minimums hovering around -2°C (29°F) and averages rising to 10°C (51°F). The steady increase continues into April, where average highs reach a pleasant 15°C (59°F), signaling the imminent arrival of warmer weather. Overall, January serves as a pivotal point in Okayama's climate, showcasing the transition from winter’s chill to the hints of spring warmth just around the corner.
In January, Okayama, Japan, experiences relatively mild precipitation, accumulating just 33 mm (1.3 inches) over an average of 3 rainy days. This marks a distinct contrast to the wetter months that follow, as February sees a slight increase with 47 mm (1.9 inches) and five precipitation days. The trend escalates dramatically from March onwards, with rainfall nearly tripling by June, where 153 mm (6.0 inches) falls over 12 days. This pattern continues into the summer, peaking in July with a staggering 291 mm (11.5 inches) of rain across 17 days. Post-July, precipitation decreases but remains significant, highlighting a clear trend of escalating rainfall from the early winter into the summer months before tapering off in late fall. January sets the stage for this annual cycle, offering a brief respite before the heavier rainfalls that characterize Okayama's climate.
In January, Okayama, Japan, experiences a humidity level of 82%, setting the tone for a generally moist winter. As the months progress into February and March, humidity declines slightly to 79% and 73%, respectively, providing a brief respite. However, as spring transitions into summer, the air becomes increasingly saturated, with April and May seeing a rise to 74% and 84%. This upward trend continues dramatically into June and July, where humidity peaks at an oppressive 92%, lingering through August as well. As autumn rolls in, humidity gradually recedes, settling back to 87% in September and hovering around 85% in October before returning to 82% in December. Overall, Okayama's humidity showcases a cyclical pattern, with the most intense levels occurring during the peak of summer, contrasted by a more moderate climate in the winter months.
In January, Okayama experiences a UV Index of 4, classified as moderate, allowing for a relatively safe outdoor experience with a burn time of 30 minutes. As the months progress, the UV Index steadily rises, signaling a shift towards more intense sun exposure. By February, it jumps to 6 (high), and by March, it escalates to 8 (very high), reducing safe exposure to just 15 minutes. April and May peak at an extreme index of 11, with a critical burn time of only 10 minutes. This trend continues into the summer months, with July and August maintaining a high of 12, prompting caution for sun-seekers. As autumn arrives, the UV intensity decreases, bringing the index down to 10 in September and 7 in October. Ultimately, by December, there's a return to a moderate index of 4, providing a gentle reprieve from the more aggressive UV levels of summer. For detailed insights on UV trends throughout the year, visit Okayama UV Index.
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In January, Okayama embraces 175 hours of sunshine, setting the tone for a gradual increase in daylight as the months unfold. February sees this number rise to 225 hours, a promising start to the year, followed by a more substantial leap to 259 hours in March. As spring approaches, April brightens with 281 hours, leading into a vibrant May that boasts 294 hours of sunny skies. This trend peaks in the summer, with August shining at a remarkable 302 hours, before a gradual decline begins in September with 247 hours. The fall months maintain a gentle glow, with October and November receiving 237 and 233 hours, respectively, while December wraps up the year with 210 hours. Overall, Okayama's climate transforms beautifully, showcasing a vibrant tapestry of sunshine that ebbs and flows throughout the year.
In January, Okayama, Japan, enjoys a 49% chance of sunny weather, making it one of the more optimistic months for sunshine as winter sets in. This likelihood increases slightly in February, reaching 54%, before dipping in March. Notably, the percentage of sunny days demonstrates a seasonal ebb and flow; it peaks in the later months, with a striking 61% in December, suggesting residents can anticipate more sun as the year wraps up. This trend highlights a gradual shift towards sunnier conditions as winter progresses, giving a hint of hope for those hoping to bask in the sun during the typically cooler January days.
In Okayama, Japan, January marks the beginning of the year with a consistent 10 hours of daylight, mirroring that of February. As the days gradually lengthen into March, sunlight increases to 11 hours, heralding the arrival of spring. By April and May, the charm of blossoming nature is accompanied by a boost in daylight to 13 hours, creating vibrant afternoons. June and July peak at 14 hours, offering long, sun-filled days perfect for outdoor activities. August sees a slight decline, dropping back to 13 hours, while September and October gradually shorten the daylight to 12 and 11 hours respectively. As autumn unfolds, November returns to 10 hours, eventually leading to December, where daylight dwindles to 9 hours. This cyclical pattern underscores the transition of seasons in Okayama, with daylight gradually building from the depths of winter to the height of summer before receding again.
In Okayama, Japan, the January wind brings a refreshing breath of air with an average speed of 3.2 m/s (7 mph), setting off the year with a brisk start. This gentle but noticeable breeze is slightly less robust than the winds of February, which pick up to 3.5 m/s (8 mph), marking a subtle transition toward the livelier spring season. Interestingly, as the months progress into March and beyond, the wind tends to ease, fluctuating between 2.2 m/s (5 mph) and 2.9 m/s (6 mph) throughout the summer and early fall. However, come December, there's a nostalgic return of the stronger winds, reminiscent of January's breezy charm at 3.3 m/s (7 mph). This cycle highlights not only the shifting seasons but also the comforting constancy of the winds that characterize Okayama's climate.
Weather in Okayama varies notably across the year, with each month offering distinct climate conditions. This page compares January’s weather to other months in Okayama, focusing on differences in temperature, rainfall, humidity, and UV levels.
When comparing the weather in January and February, both months exhibit chilly temperatures, but February sees slightly colder minimums, dropping to -5°C (23°F) compared to January's minimum of -3°C (26°F). The average temperature remains stable at around 6°C (43°F) in both months; however, February can experience a warmer peak with maximum temperatures reaching 21°C (70°F), surpassing January's high of 16°C (62°F). February also tends to be wetter, receiving 47 mm (1.9 in) of precipitation over 5 days, while January has just 33 mm (1.3 in) over 3 days. Humidity levels are marginally lower in February at 79%, compared to January's 82%. For more detailed insights on the weather during this time, you can visit Okayama weather in February.
In comparing the weather between January and March, we notice a marked increase in temperatures as spring approaches. January experiences a minimum temperature of -3°C (26°F) and an average of 6°C (42°F), peaking at 16°C (62°F), while March sees a slightly milder minimum of -2°C (29°F) and a higher average of 10°C (51°F), with maximum temperatures reaching 24°C (75°F). Precipitation also varies, with January receiving 33 mm (1.3 in) over just 3 days, in contrast to March, which sees a significant increase in rain, totalling 94 mm (3.7 in) over 9 days. Furthermore, humidity levels in January are notably higher at 82%, compared to March's 73%. For more detailed insights, you can check Okayama weather in March.
When comparing the weather in January and April, significant differences emerge. January tends to be much colder, with temperatures ranging from a minimum of -3°C (26°F) to a maximum of 16°C (62°F), and an average temperature of 6°C (42°F). In contrast, April sees a notable rise in thermometers, with temperatures ranging from 1°C (34°F) to 26°C (79°F) and an average of 15°C (59°F).
However, April also brings more rainfall, with total precipitation reaching 119 mm (4.7 in) over 8 days, compared to January's milder 33 mm (1.3 in) over just 3 days. Although April is wetter, its lower humidity of 74% makes it feel more comfortable than January's 82% humidity. For more detailed information on weather patterns specific to April, visit Okayama weather in April.
In January, the weather tends to be quite chilly, with temperatures ranging from a minimum of -3°C (26°F) to a maximum of 16°C (62°F) and an average of 6°C (42°F). The month experiences relatively low precipitation, totaling 33 mm (1.3 in) over just 3 days, with humidity at 82%.
In contrast, May brings considerably warmer temperatures, with a minimum of 7°C (45°F), an average of 20°C (68°F), and a peak of 32°C (89°F). This transition to summer is accompanied by increased rainfall, totaling 114 mm (4.5 in) spread over 9 days, while humidity remains slightly higher at 84%. For a detailed overview of weather conditions during this month, check out Okayama weather in May.
In January, the weather in Okayama is quite chilly, with average temperatures ranging from a minimum of -3°C (26°F) to a maximum of 16°C (62°F). The month sees an average precipitation of 33 mm over just three days, and humidity levels hover around 82%. In stark contrast, June welcomes much warmer temperatures, with averages between a minimum of 12°C (54°F) and a maximum of 33°C (91°F). This month experiences significantly higher precipitation, totaling 153 mm over 12 days, and humidity levels rise slightly to 86%. The changes in weather from January to June illustrate a shift from cold and dry conditions to warm and wet ones. For those interested in more detailed information about June weather in Okayama, you can check out Okayama weather in June.
In January, the weather is quite cool, with temperatures ranging from a chilly -3°C (26°F) at night to a mild 16°C (62°F) during the day, while average humidity sits at 82%. The month tends to experience light rainfall, totaling 33 mm (1.3 in) over just 3 days. In stark contrast, July brings significantly warmer conditions, with minimum temperatures of 20°C (68°F) and daily highs reaching up to 37°C (99°F), resulting in an average temperature of 27°C (81°F). However, this heat comes with increased precipitation, as July sees about 291 mm (11.5 in) of rain over 17 days, along with rising humidity levels at 92%. For more details on the July weather specifically, check out Okayama weather in July.
January and August present strikingly contrasting weather conditions. In January, temperatures range from a chilly -3°C (26°F) to a mild 16°C (62°F), with an average of 6°C (42°F). The month sees about 33 mm (1.3 in) of precipitation across just 3 days, combined with a relatively high humidity of 82%. In contrast, August boasts significantly warmer temperatures, with minimums of 18°C (65°F) and highs reaching up to 37°C (99°F), resulting in an average of 29°C (85°F). Precipitation is considerably higher at 171 mm (6.7 in), spread over 11 days, and the humidity climbs to a notable 92%. For more details on weather specifics, you can check Okayama weather in August.
January and September present strikingly different weather conditions. In January, temperatures range from a chilly minimum of -3°C (26°F) to a mild maximum of 16°C (62°F), with an average of 6°C (42°F). The month experiences relatively low precipitation of 33 mm (1.3 in) spread across just 3 days and maintains a humidity level of 82%. In contrast, September brings much warmer temperatures, with a minimum of 12°C (54°F) and a soaring maximum of 36°C (97°F), averaging around 25°C (77°F). This month sees significantly higher precipitation at 203 mm (8.0 in) over 12 days and a slightly increased humidity of 87%. For those curious about the specifics of September weather in Okayama, more information can be found at Okayama weather in September.
In January, the weather is significantly cooler, with temperatures ranging from a chilling min of -3°C (26°F) to a mild max of 16°C (62°F), averaging around 6°C (42°F). The month typically sees 33 mm (1.3 in) of precipitation over just three days, while humidity levels hover around 82%. In stark contrast, October boasts much warmer temperatures, with a minimum of 7°C (45°F) and an average high of 32°C (90°F), culminating in an average of 19°C (67°F). However, October is also wetter, receiving 169 mm (6.7 in) of rain over 11 days and a slight increase in humidity to 85%. For a deeper look at the specifics of October weather, check out Okayama weather in October.
In January, the weather is noticeably colder, with temperatures ranging from a minimum of -3°C (26°F) to a maximum of 16°C (62°F), while November offers a milder experience with temperatures from 0°C (32°F) to 25°C (77°F). Precipitation remains fairly consistent between the two months, with January receiving 33 mm (1.3 in) and November slightly less at 30 mm (1.2 in), both occurring over three days. Additionally, January's humidity is slightly lower at 82%, compared to 84% in November, making the latter month feel more comfortable overall. For more details about November weather, you can visit Okayama weather in November.
In comparing the weather between January and December, January tends to be slightly cooler, with average temperatures ranging from -3°C (26°F) to a maximum of 16°C (62°F), compared to December's milder range of -2°C (29°F) to 20°C (69°F). Additionally, January receives less precipitation, with 33 mm (1.3 in) over just 3 days, whereas December experiences more rain totaling 45 mm (1.8 in) across 6 days. Interestingly, both months share the same humidity level of 82%. For more details on December weather, you can check Okayama weather in December.
January in Okayama sets the stage for a distinct seasonal shift, as temperatures dip significantly compared to the milder months that precede it. With a maximum of around 16°C and an average hovering close to 6°C, the chill is palpable, especially during the brisk nights when temperatures can drop to a biting -3°C. While January experiences relatively low precipitation—only about three rainy days—it comes with a heightened humidity of 82%, adding a damp chill to the air. This unique blend of cooler temperatures and occasional rain makes January feel distinctly different from the warmer, more temperate months of the year. For more insights into what you can expect throughout the year, check out Okayama Climate.